Signal Driver -- With Train Detector

This driver makes it easy to power any two-color signal (sold separately). Unit will automatically turn on up to two bulbs or LEDs (up to 100ma) and is triggered by a photocell. In operation, the shadow of a passing train turns off the green light and turns on the red. Once the train passes, the signal can be set to stay red from two to 30 seconds, using the built-in adjustment on the circuit board. Fully assembled, the driver also includes an adjustable light sensor, resistors for use with LED signals, instructions, and a basic wiring diagram.